It's hard to gauge how well any rookie (or veteran) did during OTAs or minicamps, as teams almost always speak praise instead of criticism.
That's not to say some rookies didn't kill it in OTAs, just that we should take team reports with a grain of salt.
It also means that most of the "stock down" category involves injuries more than lack of ability.
So this is all to be taken with some more of that salt I just mentioned. These are players who, according to reports, appear either to be performing well or missing time.
It's all a roll of the dice until the pads come on and the players start hitting each other.